George and Harold aren't bad kids. They just like to "liven things up" for everybody. Unfortunately, their THOUGHTFUL jokes sometimes get them into a LOT of trouble.

And when Professor Pippy P. Poopypants becomes their new science teacher . . . well, George and Harold almost cause the entire planet to be taken over by a maniacal, mad-scientist guy in a giant robot suit! Who will stop the perilous plot of Poopypants?!!? This looks like a job for Captain Underpants!